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The light source that uses electric energy to do work and produces visible light is called electric light source (rectangular lighting). The use of electric light source lighting, called electric lighting:
Electric lighting can be divided into four categories: resistance lighting, arc lighting, gas lighting and phosphor lighting according to different lighting methods; according to the nature of lighting, it is divided into three categories: general lighting, local lighting and decorative lighting.
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Lighting method of electric light source
1. Resistive luminescence is a method that uses the inherent resistance of the conductor itself to generate heat after being energized, reaching the level of incandescence and emitting light. Such as commonly used incandescent lamps, iodine tungsten lamps and so on.
2. Arc luminescence, which is a force method that uses the discharge of two electrodes to generate a high-heat arc to emit light. such as carbon lamps.
3. Gas luminescence, which is a method of injecting dilute gas and metal vapor into a transparent glass tube, and using a diode discharge to make the gas glow with high heat. Such as sodium lamps, dysprosium lamps, etc.
4. Phosphors emit light, which is a kind of thin gas or trace metal injected into a transparent glass tube, and a layer of phosphors is coated on the inner wall of the glass tube. method of light. such as fluorescent lamps.
